kubernetes集群搭建

工作环境：

主机名   IP   系统  
master   192.168.199.6   rhel7.4  
node1   192.168.199.7   rhel7.4  
node2   192.168.199.8   rhel7.4  

[root@master ~]#yum install kubernetes etcd flannel -y

[root@node1 ~]#yum install kubernetes flannel -y

[root@node2 ~]#yum install kubernetes flannel -y

[root@master ~]# vim /etc/etcd/etcd.conf
  6 ETCD_LISTEN_CLIENT_URLS="http://localhost:2379,:2379"
 21 ETCD_ADVERTISE_CLIENT_URLS="http://localhost:2379,:2379"
[root@master ~]# systemctl start etcd

[root@master ~]# netstat  -autup|grep 2379
tcp        0      0 localhost:2379          0.0.0.0:*               LISTEN      5442/etcd           
tcp        0      0 master:2379             0.0.0.0:*               LISTEN      5442/etcd           
tcp        0      0 master:2379             master:51468            ESTABLISHED 5442/etcd           
tcp        0      0 localhost:2379          localhost:38090         ESTABLISHED 5442/etcd           
tcp        0      0 master:51468            master:2379             ESTABLISHED 5442/etcd           
tcp        0      0 master:51456            master:2379             TIME_WAIT   -                   
tcp        0      0 localhost:38090         localhost:2379          ESTABLISHED 5442/etcd 
[root@master ~]# systemctl enable etcd

检查etcd cluster状态
[root@master ~]# etcdctl cluster-health
member 8e9e05c52164694d is healthy: got healthy result from :2379
cluster is healthy

检查etcd集群成员列表

[root@master ~]# etcdctl member list
8e9e05c52164694d: name=default peerURLs=http://localhost:2380 clientURLs=http://192.168.199.6:2379,:2379 isLeader=true

[root@master ~]# vim /etc/kubernetes/config
 22 KUBE_MASTER="--master=http://192.168.199.6:8080"
[root@master ~]# vim /etc/kubernetes/apiserver
  8 KUBE_API_ADDRESS="--insecure-bind-address=0.0.0.0"
 17 KUBE_ETCD_SERVERS="--etcd-servers=http://192.168.199.6:2379"
 23 KUBE_ADMISSION_CONTROL="--admission-control=AlwaysAdmit"
 [root@master ~]# vim /etc/kubernetes/controller-manager 该文件不用修改
[root@master ~]# vim /etc/kubernetes/scheduler
  7 KUBE_SCHEDULER_ARGS="--address=0.0.0.0"

[root@master ~]# vim /etc/sysconfig/flanneld
  4 FLANNEL_ETCD_ENDPOINTS="http://192.168.199.6:2379"
  8 FLANNEL_ETCD_PREFIX="/k8s/network"
 11 FLANNEL_OPTIONS="--iface=ens32"

[root@master ~]# systemctl restart flanneld
   [root@master ~]# etcdctl set /k8s/network/config \'{"network":"10.255.0.0/16"}\'
   {"network":"10.255.0.0/16"}
   [root@master ~]# etcdctl get /k8s/network/config
   {"network":"10.255.0.0/16"}
[root@master ~]# systemctl restart kube-apiserver kube-controller-manager kube-scheduler.service
[root@master ~]# systemctl status kube-apiserver kube-controller-manager kube-scheduler.service
[root@master ~]# systemctl enable kube-apiserver kube-controller-manager kube-scheduler
[root@master ~]# systemctl enable flanneld

node1